DISPLAY DEVICE AND METHOD OF DRIVING THE SAME

• US 20170045975A1
• Filed: 10/28/2016
• Published: 02/16/2017
• Est. Priority Date: 06/09/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: PAK, SANG-JIN, CHO, MAN-SEUNG, UH, KEE-HAN, LEE, JOO-HYUNG
• Granted Patent: US 10,133,384 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

A display device includes a display panel, a source driving part, a gate driving part, a readout part and a pulse generating part. The display panel includes an array substrate on which a source line and a gate line are formed, and an opposite substrate on which a common electrode is formed. The readout part is electrically connected with at least one of the lines of the array substrate and the common electrode of the opposite substrate, and reads out a detection signal during an elimination period of a frame period. The pulse generating part outputs a control pulse for driving the readout part during the elimination period. Accordingly, a detection signal is read out through lines or a common electrode that are/is formed for displaying an image, so that an aperture ratio may be increased, and a manufacturing process thereof may be simplified.

Claims

1. A display device comprising:

a display panel including an array substrate on which a source line and a gate line are formed and an opposite substrate on which a common electrode is formed;

a source driving part outputting a data signal to the source line during a display period of a frame period;

a gate driving part outputting a gate signal to the gate line during the display period;

a readout part reading out a detection signal during an elimination period of the frame period, the readout part being electrically connected with at least one of the lines of the array substrate and the common electrode of the opposite substrate, wherein the elimination period is separate from the display period; and

a pulse generating part outputting a control pulse for operating the readout part during the elimination period.

2. The display device of claim 1, wherein the readout part comprises:

a first readout part reading out a first detection signal from the source line, the first readout part being connected to a terminal of the source line; and

a second read out part reading out a second detection signal from the gate line, the second readout part being connected to a terminal of the gate line.

3. The display device of claim 2, wherein light is incident onto the opposite substrate of the display panel, and the array substrate is adapted to be touched by an object.

4. The display device of claim 3, further comprising a voltage generating part applying a direct current voltage to the common electrode during the elimination period.

5. A method of driving a display device including an array substrate on which a source line and a gate line are formed and an opposite substrate on which a common electrode is formed, comprising:

displaying an image at the display device by outputting a driving signal to the source and gate lines during a display period of a frame period; and

reading out a detection signal detected at the display device from at least one of the lines of the array substrate and the common electrode of the opposite substrate during an elimination period of the frame period, wherein the elimination period is separate from the display period.

6. The method of claim 5, wherein reading out the detection signal comprises reading out a first detection signal from the source line and reading out a second detection signal from the gate line.

7. The method of claim 6, wherein reading out the detection signal further comprises applying a direct current voltage to the common electrode during the elimination period when light is incident onto a bottom surface of the opposite substrate.